Find Out the Value Given Equation? If

If (x2+1/x2=23), then the value of (x4+1/x4) is

  1. 527
  2. 526
  3. 429
  4. 629
Monis Rasool Professor Asked on 15th September 2015 in Maths.
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1 Answer(s)

Answer: (1) 527

Explanation:-
X2 + 1/X2 = 23
Squaring on both side,
(X2 + 1/X2)2 = X4 + 1/X4 + 2 x X2x 1/X2
Put the value of X2 + 1/X2 = 23
Then, 232 = X4 + 1/X4 + 2
529 – 2 = X4 + 1/X4
X4 + 1/X4  = 527

Then, the value of X4 + 1/X4 is 527.

Hence, the answer is (1) 527.

Anurag Mishra Professor Answered on 15th September 2015.
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